package com.atls.eduservice.service.impl;

import com.atls.eduservice.entity.EduCourse;
import com.atls.eduservice.entity.EduCourseDescription;
import com.atls.eduservice.entity.vo.CourseInfoVo;
import com.atls.eduservice.entity.vo.CoursePublishVo;
import com.atls.eduservice.entity.vo.CourseQuery;
import com.atls.eduservice.entity.vo.frontvo.CourseFrontVo;
import com.atls.eduservice.entity.vo.frontvo.CourseWebVo;
import com.atls.eduservice.mapper.EduCourseMapper;
import com.atls.eduservice.service.EduChapterService;
import com.atls.eduservice.service.EduCourseDescriptionService;
import com.atls.eduservice.service.EduCourseService;
import com.atls.eduservice.service.EduVideoService;
import com.atls.servicebase.exception.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 课程 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2021-01-30
 */
@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {

    @Autowired
    private EduCourseDescriptionService courseDescriptionService;

    @Autowired
    private EduChapterService chapterService;

    @Autowired
    private EduVideoService videoService;

    @Override
    public String saveCourseInfo(CourseInfoVo courseInfoVo) {

        //1 向课程表添加课程基本信息
        //CourseInfoVo对象转换eduCourse对象
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int insert = baseMapper.insert(eduCourse);
        if(insert==0){
            throw new GuliException(20001,"添加课程信息失败");
        }

        //获取添加课程之后的id
        String cid=eduCourse.getId();
        //2 向课程简介表添加课程简介
        //edu_course_description
        EduCourseDescription courseDescription = new EduCourseDescription();
        courseDescription.setDescription(courseInfoVo.getDescription());
        //设置描述id就是课程id
        courseDescription.setId(cid);
        courseDescriptionService.save(courseDescription);

        return cid;

    }

    //根据课程id查询课程信息
    @Override
    public CourseInfoVo getCourseInfo(String courseId) {
        
        //1.查询课程表
        EduCourse eduCourse = baseMapper.selectById(courseId);
        CourseInfoVo courseInfoVo=new CourseInfoVo();
        BeanUtils.copyProperties(eduCourse,courseInfoVo);
        
        //2.查询课程描述表
        EduCourseDescription courseDescription = courseDescriptionService.getById(courseId);
        courseInfoVo.setDescription(courseDescription.getDescription());

        return courseInfoVo;
    }

    //修改课程信息
    @Override
    public void updateCourseInfo(CourseInfoVo courseInfoVo) {
        // 1.修改课程表
        EduCourse eduCourse=new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int update = baseMapper.updateById(eduCourse);
        if(update==0){
            throw  new GuliException(20001,"修改课程信息失败");
        }

        // 修改课程描述表
        EduCourseDescription courseDescription=new EduCourseDescription();
        courseDescription.setId(courseInfoVo.getId());
        courseDescription.setDescription(courseInfoVo.getDescription());
        courseDescriptionService.updateById(courseDescription);

    }

    //根据课程id查询课程
    @Override
    public CoursePublishVo publishCourseInfo(String id) {
        CoursePublishVo coursePublishVo = baseMapper.getPublishCourseInfo(id);
        return coursePublishVo;
    }

    @Override
    public void pageQuery(Page<EduCourse> coursePage, CourseQuery courseQuery) {
        QueryWrapper<EduCourse> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("gmt_create");

        String title = courseQuery.getTitle();
        String teacherId = courseQuery.getTeacherId();
        String subjectParentId = courseQuery.getSubjectParentId();
        String subjectId = courseQuery.getSubjectId();

        if (!StringUtils.isEmpty(title)) {

            queryWrapper.like("title", title);

        }


        if (!StringUtils.isEmpty(teacherId) ) {
            queryWrapper.eq("teacher_id", teacherId);
        }
        if (!StringUtils.isEmpty(subjectParentId)) {
            queryWrapper.ge("subject_parent_id", subjectParentId);
        }
        if (!StringUtils.isEmpty(subjectId)) {
            queryWrapper.ge("subject_id", subjectId);

        }
        baseMapper.selectPage(coursePage, queryWrapper);
    }


    //根据课程id删除课程
    @Override
    public void removeCourse(String courseId) {
        //1.删除课程id删除课程小节
        videoService.removeVideoByCourseId(courseId);
        //2.根据课程id删除课程章节
        chapterService.removeChapterByCourseId(courseId);
        //3.根据课程id删除课程描述
        courseDescriptionService.removeById(courseId);
        //4.根据课程id删除课程
        baseMapper.deleteById(courseId);
    }

    @Cacheable(value = "course",key = "'courseList'")
    @Override
    public List<EduCourse> selectHostCourse() {
        QueryWrapper<EduCourse> courseWrapper=new QueryWrapper<>();
        courseWrapper.orderByDesc("id");
        courseWrapper.last("limit 8");
        List<EduCourse> list = baseMapper.selectList(courseWrapper);
        return list;
    }

    //条件分页查询课程
    @Override
    public Map<String, Object> getFrontCourseList(Page<EduCourse> pageCourse, CourseFrontVo courseFrontVo) {

        //2 根据讲师id查询所讲课程
        QueryWrapper<EduCourse> wrapper = new QueryWrapper<>();
        //判断条件值是否为空，不为空拼接
        if(!StringUtils.isEmpty(courseFrontVo.getSubjectParentId())) { //一级分类
            wrapper.eq("subject_parent_id",courseFrontVo.getSubjectParentId());
        }
        if(!StringUtils.isEmpty(courseFrontVo.getSubjectId())) { //二级分类
            wrapper.eq("subject_id",courseFrontVo.getSubjectId());
        }
        if(!StringUtils.isEmpty(courseFrontVo.getBuyCountSort())) { //关注度
            wrapper.orderByDesc("buy_count");
        }
        if (!StringUtils.isEmpty(courseFrontVo.getGmtCreateSort())) { //最新
            wrapper.orderByDesc("gmt_create");
        }

        if (!StringUtils.isEmpty(courseFrontVo.getPriceSort())) {//价格
            wrapper.orderByDesc("price");
        }

        baseMapper.selectPage(pageCourse,wrapper);

        List<EduCourse> records = pageCourse.getRecords();
        long current = pageCourse.getCurrent();
        long pages = pageCourse.getPages();
        long size = pageCourse.getSize();
        long total = pageCourse.getTotal();
        boolean hasNext = pageCourse.hasNext();//下一页
        boolean hasPrevious = pageCourse.hasPrevious();//上一页


        //把分页数据获取出来，放到map集合
        Map<String,Object> map=new HashMap<>();
        map.put("records", records);
        map.put("current", current);
        map.put("pages", pages);
        map.put("size", size);
        map.put("total", total);
        map.put("hasNext", hasNext);
        map.put("hasPrevious", hasPrevious);

        return map;
    }

    @Override
    public CourseWebVo getBaseCourseInfo(String courseId) {
        return baseMapper.getBaseCourseInfo(courseId);
    }


}
